Diagnostic instrument



March 15, 1927.

DIAGNOSTI C INSTRUMENT Original Filed Feb. l5, 1923 46 47 50 4345 49 Z I 4,2/ ,I l l I i; l .27 'I 40 Z5 Z4 44 zo 57 16,9 755 I 56 1 ZZ s s H\ lfl. 9 14.

30 um@ '0 l,

Henrg bezeng, Pig l v 3511 l/ I y I 11,621,461 H. l.. DE ZENG 'I l Patented Mar.

HENRY I.. DE ZENG, or y PATTY, or soUTrrBnIDGE, MAs

- sncrrusifiTTs. Y

l Y l Original application rled February 15,

' This invention 15, 192,7. ED S315 relates to improvements in diagnostic instruments, and has particular reference to hand as ophthalmoscop es,

fete., adapted to the purposeof operated instruments, such retinoscopes,

eye: .Y

Thisk application isv a 4division of my copending applicationfiled February 15, 1923,

Serial Number 619,085, 'now' PatentA No.

'-1,55a55a-daad Nvember 5, 1925.

One of theV principal :objects ofthe present invention is to provide an electric diagnostic instrumentrwh'erein new and novel means are provided Vfor'controlling the lamp circuit.

- 7A still further'. Objectis to provide an elecc tric diagnostic instrument controlling meansV is so constructed and .ranged that when the operator the instrument'he can open or cuit through the lamp '.by the use of a ployed in holding Another object circuit breaker which tact and which contains no wherein the lamp ardesires to use close the ciras may be desired, single handA which is em- YtheV instrument.

to provide an improved is positive in its condelicate electrical connections which frequently become inopv,erative land, troublesome. c Another object `is`to breaker which is yprovide a circuit very compact, symmetrical and not readily displaced from its position of Contact. v "A further obje y"vice which will be simple' in Vits construction,

strong and durable 1n service, vance inthe art.

ct to provide such a dem "Other' novel featuresv of construction', to# getherf-with additional advantagesr of the present invention,

fully appear in 'ffscription and the l For the purpose of will hereinafter more the following vdetailed 'deappended claims.

illustrating the present invention, there has been shown 1n the accompanying drawings, which :is at present to be preferred, since this embodiment will be found in practice to giye satisfactory instrumentalities and reliable results. fhowever,'to be understood that the various -It is,

ofwhich the invention consists can bevariously arranged and organized, and construed as l ment and organi that the invention is not to 'be limited to the precise arrangezation of these instrumen- GENEVA, Naw YORK,- AssIGNoRTo l sAcnUsnTTs, A von-UNTARY AssocIATIoNor Mns-1 l l i DIAGNOSTIC INSTRUMENT.

I y otoscopes, project a'beam of light for .making examinations of the f and screwithreaded to one embodiment .lar V31 and l adjustably talities, as hereinafter shown and described. Figure 1 is a side view, partly in section,

of a vdiagnostic linstrument constructed in accordance Vwith .the present invention.

AMERICAN oITIcALcoMf f va .I .l2 's 1923, ,SerialANoL 619,085.y 'Divided and this application led'Oct-ofber v '-3, 1925. serial-No. 60,215. f w

V,Figure 2 isan enlarged sectional view'of the circuit controlling mechanism.

. Figures 3 and 4 are vperspective views of Y washers, employed in the con- Y two different struction of the present invention. s s, Referring to the drawings, and particularly to Figure 1, there is shown a diagnostic instrument comprising a handle 10, Vat the is an extension 11 adaptp upper end of which ed to support the body portion orinstrument head 12. In this view an ophthalm'oscope has been` illustrated, b-ut itr is that the invention maybe equally well ap plied to retinoscopes, otoscopes, etc. f

Referring toFi'gure 2,it will be noted' that the handle memberl 10 is hollow andadapted to containan electrical battery 13,1 at the upper end of whichis the usual pole l14:. The

said handle member- 10l is closed at'it's lower to4 be understood is provided at itsopposite end with the cover 16, having a centralvopening therein, and;` withinwhichA openingisfarranged'to be secured in' any suitable manner-,such as by means'ofa press ht, anv

Positioned between the saidV bead 18 `and the cover 16 is a metal Vwasher .19, such as lshownin Figure 4.

" Also secured within cover 16,"but inwardly of the ring: 17, is a lamp holder 20, which is centrally apertured form a socket 21 fo-rv the reception of an incandescent lamp 22.

Belowthe socket 21the holder is bored out to a larger diameter, as at 23, and secured within this bore isan insulating bushing `24:, said bushing being plunger 26, which projects said bushing and is urged into contactwith the lamp 22 by means of' a spring 28 which .end by'means ofza removable lclosure 15, and i l insulating ringv 17 `formed with an'outwardly projecting bead the opening of the Y l formed with a recess 25 within which (is positioned a through the opening 27 m.

is heldrwithin said recess by means ofthe threaded cap 29. The'cap 29 is also provided with a recess 30, to receive the lower end portion of the spring 28, whereby toretain the same in proper contact'with the plunger 26.

socket end of the lamp threaded Vupon and i Formed lintegrally with and' adjacent'the 'holder 20 is the colsurrounding said holder 20,7between the collar 31 and insulating' member 17, is a sleeve 32 provided at its lower end With the depending flange 33 adapted to contact with the Washer 19 in order Y through the lamp, as Will bermore fully hereinafter set forth. Surrounding the lamp holder 20, and positioned between the shoulder 31 and sleeve 32, is a friction Washer 34, such as shown in Figure 3, the collar 3l acting as a stop to limit theupwai'd movement of the sleeve. Y v

Y r Secured tothe inner face of the closure l5, and contacting with the bottom of the electrical battery 13, is a coil spring 35, Which urges the battery inthe direction of the lamp,'whereby to retain the'pole 14 in contact With the cap 29.

. Threaded upon the upper end of the lamp holder 20 is a detachable member 36 having a bore or passage`37 therethrough, at the 'sage 4l therein,

bottom of Which is. located a translucent member 38, While at the top of the passage is located the condensing` lens 39. Threaded upon the upper end of the detachable member is the casing 40, having the pasat the outer portion of Which is located the condensing lens 42, the elements 38, 39'and- 42 being in vertical alignment.V Y, Y f

` The upper end portion of the casing 40 carries the housing 43, Within which is contained the rotatable disk 44 having ports 45 Which'can be turned into alignment with the' port 46 of the stationary member 47.

The outer Wall of the casing 43 has the slot 48 therein, Ywhich is inl horizontal alignment with the ports an'd 46 and the slot 50 in the'casing. Located abovezthe condensing lens 42 is a reflector 48, having the sight opening 49 which is in alignment with the said ports 45, 46 and the slots 48 and 50 the'reiiector directing the light at approximately right angles to the optical axis of the 'lens 42, the operator viewing the eye of the patient through the slot 4 e operation of the present invention and particularly the circuit controlling mecha- 32 is rotated inthe .spring 28 and plunger v19 into the handle nism is'asv folloWszll/Vhen it is desired to close the circuit through the lamp, the sleeve proper direction until contacts with the Washcurrentwillthen flow through the ycap 29, the 26.into the, lamp 22. The current then flowing throughthe lamp, and back into the battery 13, will vpass through the holderY 20 into the sleeve 32, from the said sleeve 32 through the Washer member v10 and thence through the spring 35 backinto the battery 13. When it is desired to break the circuit it is only necessary' kto rotate the sleeve 32 in the opposite direction'until the ange thereof no longer contacts ivith'the Washer 19.

the flange 33 thereof er 19. The electric from the battery Vto close the circuit inasmuch as the Washer It Will be readily apparent from the above that there has been devised new and usefuldiagnostic instrument Which embodies the features of advantage enumerated as desirable in the statement of the invention and the above description Vand While there has, in the present instance, been shown one practical embodiment which will in practice, give satisfactory and reliable. results, it is to be understood that this invention is susceptible to modifications in various particulars Without departing from the spirit or scope of tlieinvention or sacrificing any of its advantages. f For instance, either one or both of the Washers v19 and 34 maybe eliminated if desired Without affecting the I practicability of the instrument inany Way 34 is simply a friction Washer employed to prevent the sleeve `32 from accidentally rotating and 5closing the circuit, While should the Washer 19V be removed, the flange 33 of the sleeve 32'Would contact directly With the cover: 16 of the handle member, which contact Would effectively close the circuit throughthe lamp.

t isv in view of such modifications Aas referred to above that the invention isnot to be construed as limited to the Vprecise details of construction herein shown and described but instead, that the right is reserved Within the scope of the appended claims Without departing from the spirit of" the invention. What is claimed is: f l. In a device of the character described, a handle, a battery in the handle having.V aV projecting pole \member, a cover capy over the handle having an internal opening, an annular lamp socket iin the opening. of the cap, anv annular -insulatingmember on the inside of the lamp socket, an annular insulating member on the r outside of the lamp socket insulating the same from the cap, a contact member in the inner insulating meniber connecting with the lamp socket and adapted to engage the battery` pole, a contact piece on the cap insulated from the light socket and an annular sleev-eV rotatably mounted on the outside of the lamp socket having a portion adapted to tact piece on the cap in certain rotative positions to close the circuit and to'disengage the contact in other positions to break the circuit. Y

v2. ln a device of theV character described, a handle, a battery in the handle having a projecting pole member, a cover cap over the handle having an internal opening, an annular lamp socket in the opening of the cap, an annular insulating member on the engage the con- Y inside of the lamp socket, an annular insui nesting with thelamp socket and adapted circuit and to disengage the contact in other to engage the battery pole, a Contact piece positions to break the circuit, a member on the capY insulated from the light socket, having a light passage Way over the `lamp -10 an annular sleeve rotatably mounted on the socket and means for detachably connecting outside of the lamp socket having a portion the lamp vsocket to the light passage Way adapted to engage the Contact piece on the member.V

cap in certain rotative positions to close the Y l HENRY L. DE ZENG.. 

